If the north poles of two bar magnets are brought r yb; 5i,ex9nqclose to each other, the magnets wilen qr9,;yi b5xl

  If the south pole of one bar magnet is brought near the north pole o*o gs+qfb4duo19p b2cf a second bar m2g b9boc1+ospf q4d*uagnet, the two magnets will

  If a bar magnet is divided into two equalh8 gvu07k qs2l pieces,

  The Earth's geographic North Pole is magneticalla/x8 do5ijk e:79di)e (k kscey a

  The south pole of a magnet points towarmuv7j9x92ghqrho.wi h z q ;:() ed(nud the Earth's

  An electric current m8ldod s.c+m, o8g/y cahp8*k produces

  Which of the followi +ee nk0+4bomung is correct?

  A vertical wire carries a current straupv2/eq. djx: ight down. To the east of this wire, the magnetic field poivud2:/pexj .qnts

  A horizontal wire carries a current straight c 5cbyoh9i( 0stoward you. From your point of view, the magnetic field caused by this cu c(bi5scy9ho0 rrent

  A current carrying loop of wire lies flat on a table to1((n s-9366s cwr3zb t -pyhsezutk qgp. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic ye6-36p(b thtrug n1 zc9ss-zk (3swq field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lie -(eghkdd:htmr(d, m*vp , +lkwa2h 7is flat on a table top. When viewed from above, the current moves around the loop in a dwk* plhk m,v:hdimr72at- (d(g+ ,hecounterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnet .x;-qk+lv1s 4 qm aumy-qkfv1ic field is the

  1 T is equivalent toc /f , ne*bj7hmx-6znp1 ) n3k0aenokk

  The direction of the force on a current-carrying wire in a magnetic field xc-milqgje: *3 ;x clw4,2wsmdjvm.i,mp7a* is described.sxje 2-cag,4 :px7dww *mvm,;l3*imqj lmci by which of the following?

  The force on a current-carr0fh fa ty(sdu)(if2m2ying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field i462 6w68tk pkyvjo qwqs equal to zero when

  A vertical wire carries a current straight up in a regioneqc7eym; .7fuox 57(f mjv ou0 where the magnetic field vector points due north. What is the direction of the resulting forcfcqyeo;0e( umx7v7.75ujmofe on this current?

  A charged particle moves and experidyc*clint(p s*ux6 g 2g etm5+bn:4(rences no magnetic force. From this we can conclude tha6ng+r *x ec2my*unli(t d b5p:4cg(stt

  A charged particle moves with a constant speed through a regisgxlw. )+rq8zl 6:ns non where a uniform magnetic field is present. If the magnetic field points straight upward, then +s)68r qs nwz:g.lxl magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a consta3 t )s+ut)ekeynt magnetic field. The magnetic force on +ytts)k3)eue this particle

  A charged particle is injected into zv mi 2 y( ) owwczvlr7jq):d;7.ed41ai y*ygya uniform magnetic field such that its velocity vector is perpendicular to yic:lzy2wro();7 7dgiez amv* yw4qjd 1y v .)the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed trave8r3c *k3/ugm):ge )otwae d raling in a circular path in a uniform magnetic field. If the particle had bee) keco:a/*m 8 rwugtda3) 3egrn traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a unz2;10ax xich :bhri 2g q+8pf qbc(7uliform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would har; bhflu+:pc8hqxa2(7q2 g1xi i0 zbcve been

  At a particular instant, an electron moves eastward at speed V in a unzg8equc6z(a / iform magnetic field that is directed straight downward. The magnetic force that uzag 8qec/6 (zacts on it is

  An electron has an initial velocity to the south but is h.awgm3lx +v 9cexj +j/,owg4observed to curve upward as the result of a magnetic field. The direction of the mag.lxh4vm+e w o+/jcawg9,jx g 3netic field is

  An electron moving along the +x axis enters a region where there is a uniform maw -m-ofpo95tf(bs- x ; v:wizrgnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, anoisx(bfvom9 r-w ; -pwt5z-:fd +z out of the page.)

  The magnetic field produced by a long st. 4avoo(7eyg traight current-carrying wire is

  At double the distanwr)-uwd mx u;m xop11-ce from a long current-carrying wire, the strength of the magnetic fiel xu1uw1r-w) mmd oxp-;d produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table car okgd0, )uf4k9p5udq kry identical size currents in opposite directions. The wir0f, 9d kkopuu4q5)dgke on your right carries current toward you, and the wire on your left carries current away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal tai gla)ta8sld 6mv2*1kble carry identical current straight towargtkdsl i28amlv16a *) d you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents vtb h4l0n)qqx(kg m,+. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnituvq +,kx(0bqhm4) l tgnde of the new force between the two wires?

  A long straight wire carries current towa7hw n8dnizrh fiu1 3(+mj2g +nrd the east. A proton moves toward the east alongside and just south of the wir 87i+jz m32(ni duf+1nhgwrh ne. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries 5r elj6g7 3bc rh)l4dsa current toward the bottom of the page. 6rrd 4e 7jh3) l5sgcblWhat is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-si b,1xcjlz5/fnjj(d;j 03dxf(ir2v :n w xkiz;de on a horizontal table. If the wire5x;,:j/ i fn w0xfz(xdc;vk(1rj3i l2jd jnbzs carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tabsyi.f8nlfe2q z l k8xpoz(14:le. If the wires carry current in opposite directions, zs8(:l2z1n8. e4fof q lyikxp

  Consider two current-carrying circular loops. Both ar/ xcwpb5a o84qi 67mhoe made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the center of the smaller loop, thh6mxooaq/ibpw 5c74 8e magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. qj xm29o*o g+sgog7 i9 Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop ixqgm gg2+9i9*7oso ojs

  The maximum torque on a current carrowr m.fr(.n5x)- rcp fying loop occurs when the angle between the loop's magnetic moment and the magnetic cnofx( f-)w..rrrm5p field vector is

  When placed askew in a magnetic field, a current carrying loop trj.yp skxk*q 3lb4/a +hat is free to rotate in any direction will experience a tork3. axj*lrp4 +/kbs yqque until its magnetic moment vector

  What fundamental fact underlies the operation of ezg 0wlcn/(al8ssentially all electric motorsaw g(clnz/0 l8?

  A circular wire loop lies in a horizes pllr/s3e: 1ontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips below the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the curslerpe/1l:3 s rents interaction with the magnetic field?

  In a mass spectrometer a particle of jl ,p(w s ;hqvh7gy-wd +ed23kmass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflecte pkl3 wh7e-;dvydqj(,+ghs2wd in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the velocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists ofrej,qd5b aj1lo( 5x5d a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a straight line. In the following, disregard the magnitudes of the fields. In a velocity seleq (l1baed,55jjr5od xctor, the particles move toward the east, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a curr:7r1 i cf*j g,0nlxyedent of 0.60 A is oriented parallel to a uniform magnet*l7yx1 dg:enfij,r c0ic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current /( ;qf sq1luwdof 10 A in a direction of $30^{\circ}$ with respect to the direction of a 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.

  What is the force per moei,0w pgq6 s1eter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an anpg6,ioesqw 01 gle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lo 8ghcv.g0hq -.gd9vndng has a mass of 0.050 kg and is in a magnetic field ofnd-vghggh 80c 9 qd..v 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of4iavu k:n5g(i 0.20 T. What is the magni ngii a4:uvk(5tude of the magnetic force on the proton?

  A proton moving at $4.0 \times 10^4 \; m/s$ horizontally enters a region where a magnetic field of 0.13 T is present, directed vertically downward. What force acts on the proton?

  An electron moves with a speiu+j8rs9pf (ot6n* dqed of $5.0 \times 10^4 \; m/s$ perpendicular to a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the electron?

  A proton travels at a ,j-trnxadvm+,v +jg 2speed of $5.0 \times 10^7 \; m/s$ through a 1.0-T magnetic field. What is the magnitude of the magnetic force which acts on the proton if the angle between the proton's velocity and the magnetic field vector is $30^{\circ}$?

  An electron traveling db )/pzxd m4ye9tc d uj-t7i5x1ue north with speed $4.0 \times 10^5 \; m/s$ enters a region where the Earth's magnetic field has the magnitude $5.0 \times 10^{-5} \; T$ and is directed downward at $45^{\circ}$ below horizontal. What force acts on the electron?

  An electron moves with f u.8i/sz8nu :cmf/:r l/zs6shx hk6da speed of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the magnetic force of the electron.

  An electron moves with /9qcno,s k/qb a speed of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the acceleration of the electron.

  A proton has a speed pv*/dl5n(h l ejleg-c2,.s z nof $3.0 \times 10^6 \; m/s$ in a direction perpendicular to a uniform magnetic field, and the proton moves in a circle of radius 0.20 m. What is the magnitude of the magnetic field?

  A very long straight s1l4*lqz u m2kwire carries a current of 25 A. What is the magnitude of the k l1ls*q42mzu magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generatf2j8by *sw 3 ,5 esz fexg0jxfhl4v(;des what magnetic field at the ground, 10swe l4xdf*j2ye(z0xfvh;, 3b8j5 gsf m away?

  How much current must flow fort9h- n zym/emw,8j1o p $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a curr7e,hvsb;4t8jv1mis d7k wu24xu.me nent of 5.0 A is the magnitude 77.s; eu1wmm2btkv8 j4 h ued,snvxi4of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires c5j1k7j:2 kv l3zi,yde j 2phicarry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plaz7i52 j p:jk1h2jiyckd3vl,ene of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires c l,m0dc+c *-rm4wgv+t + jnrjtarry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. Wcmlvrdg tn,+ jwc4t * j-mr0++hat is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opp ocq2b3qp2fc.uards x+w6 n,w2h c3 q- f+/reposite directions. The wires are separated by 0.20 m. At what 2p cf qbfcq.q2 snrpr +d/+xhe w-w3 6,c3ao2upoint between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are7 gm 2a:h,-37y x;b e(a*jtciegxktve parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm posc7 e*;t etgam,hj:xky7ebv-23 (ag xiitioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currc4am+q*hll 4 xents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the twolc h ml*x+44qa wires.

  What is the magnetic field at the center of a circula4/jky) ;f9,l //vhxtqvb4lfwf qodf4 r loop of wire of radius 4.0 cm when a current j/y 9tl/of vq);k44blv /fqw fdfh,x4of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of w0smri5o2a y(gtg.ti d6 la28p ire. What magnetic field is producedlmytp( 2t086ag.r5i2 dosa i g at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 Azzmldj*uj57 -. What strength of magnetic field will i*m5zu-7d jzjl t have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generi9 uns.l bql +ad/ rra32b+mg4ate a 1.0-T magnetic fieldl2+lsna +/u 3irb g 9mqabd.r4 at the center?

  How many turns should a 10-c(e7hoogg torgb* ncx 0n 92uu 0*,rs7sm long solenoid have if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic momenxoj20v(lsk3 ghwlew 1g4e((i t of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm 4seeovxw 0kw(1ll (gh(g 2ij3 x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magne:my okojhtak* rs0 7(5tic field of 0.30 T. The currentjksy k:*hro 0(oa7m 5t in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-se yug(e47 -blfnr(, spgctional area $0.12 \; m^{2}$ consists of 200 turns, each carrying 0.50 A current. It is placed in a magnetic field of 0.050 T oriented at $30^{\circ}$ to the plane of the loop. What torque acts on the loop?

  A circular loop carrying a current of 2.0 A is in a mag6a+c uxaihc/e;mk5 p 0netic field of 3.5 T. The loop has an arick0 mp6;cu/a+ eh xa5ea of $0.12 \; m^{2}$ and its plane is oriented at a $37^{\circ}$ angle to the field. What is the magnitude of the magnetic torque on the loop?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of hljh) tyqc; x,e/n .)s0.30 T. The current in the loop is 2.0 A. What is the magnetic torque ,) cn.esxqj;)h/ tyhl when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is inilspl8 aq v;3.v fqd*2 a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What * vfqplisdqv. ;2 3al8is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of x9r 8ee:u i ;7j-dpstsrf2q )garea $0.25 \; m^{2}$ carries a current of 5.0 A. The coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point, the Earth's magnetic field is $1.2 \times 10^{-4} \; T$ directed $60^{\circ}$ below the horizontal. What is the magnitude of the torque which acts on the loop?

  In a mass spectrometer, g(jz uw, 7eof,j6mk zc56q4 w,i/rn.syo3pzk a single-charged particle (charge e) has a speed of $1.0 \times 10^6 \; m/s$ and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit is 0.020 m. What is the mass of the particle?

  A doubly charged ion witms :,l(vp(mr jv+tss 9cte(0 rh velocity $6.9 \times 10^6 \; m/s$ moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?

  A proton travels through a potentialchb-;j7it dpd8 xy0)y of 1.0 kV and then moves into a magnetic field of 0.040 T. W -jy0iy;xd)b p8 tdh7chat is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnet(nr p 0dznd9fmb7d.i2 ic field of 0.30 T oriented perpendicular to its direction of motion. Detez 0f nn(7 2rd9pmdb.dirmine the radius of the path it follows.

  A beam of electrons is accelerated through a potentiah7o+yxbg w :y(l difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be h byo g:xyw(7+undeflected?